Phylum [Vertebrata] Lamarck, 1801 see Infraphylum Vertebrata Lamarck, 1801
   Class Mammalia Linnaeus, 1758 - mammals
     Subclass Theria Parker & Haswell, 1897
       Infraclass Eutheria Gill, 1872
         Cohort Edentata Cuvier, 1798
           Order Xenarthra Cope, 1889 - xenarthrans see Magnorder Xenarthra Cope, 1889
             1 Family Dasypodidae Gray, 1821 - armadillos
             2 Family †Glyptodontidae Gray, 1869
             3 Family Megalonychidae Gervais, 1855 - West Indian sloths and two-toed tree sloths
             4 Family ‡Megatheriidae Gray, 1821
             5 Family †Mylodontidae Gill, 1872
             6 Family Myrmecophagidae Gray, 1825 - anteaters